.page-news {
  --news-pad: 20px;
  --news-max: 1180px;
  --news-dark-line: rgba(247, 243, 234, 0.16);
  --news-dark-text: rgba(247, 243, 234, 0.76);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.85;
  letter-spacing: 0.005em;
}

.page-news *,
.page-news *::before,
.page-news *::after {
  box-sizing: border-box;
}

.page-news .news-wrap {
  width: 100%;
  max-width: var(--news-max);
  margin: 0 auto;
  padding: 0 var(--news-pad);
}

.page-news .mono {
  font-family: var(--font-mono);
}

/* breadcrumbs */
.page-news .breadcrumbs {
  padding-top: calc(var(--header-h) + 8px);
}

.page-news .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}

.page-news .breadcrumbs li::after {
  content: "/";
  margin-left: 8px;
  color: var(--mist);
}

.page-news .breadcrumbs li:last-child::after {
  content: "";
  margin-left: 0;
}

.page-news .breadcrumbs a {
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-news .breadcrumbs a:hover {
  color: var(--cinnabar);
  border-bottom-color: var(--cinnabar);
}

.page-news .breadcrumb-current {
  color: var(--ink);
}

/* hero */
.page-news .news-hero {
  padding: 28px 0 0;
}

.page-news .hero-grid {
  display: grid;
  gap: 40px;
}

.page-news .chapter-label {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--ink-soft);
}

.page-news .chapter-num {
  display: inline-block;
  padding: 1px 6px;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--cinnabar);
}

.page-news h1 {
  margin: 0 0 22px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(34px, 7.6vw, 64px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-news .lede {
  margin: 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.9;
  color: var(--ink-soft);
}

.page-news .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 28px 0 14px;
}

.page-news .hero-copy-note {
  margin: 0;
  font-size: 13px;
  color: var(--ink-soft);
}

.page-news .hero-copy-note::before {
  content: "";
  display: inline-block;
  width: 18px;
  height: 1px;
  margin-right: 8px;
  vertical-align: middle;
  background: var(--gold);
}

.page-news .hero-panel {
  position: relative;
  padding-top: 20px;
  border-top: 1px solid var(--gold);
}

.page-news .hero-panel-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--ink-soft);
}

.page-news .hero-number {
  margin: 4px 0 10px;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: clamp(52px, 15vw, 108px);
  line-height: 0.94;
  letter-spacing: -0.05em;
  white-space: nowrap;
  color: var(--ink);
}

.page-news .num-rev {
  color: var(--cinnabar);
}

.page-news .hero-copy-btn {
  display: inline-block;
  margin: 0 0 22px;
  padding: 0 0 3px;
  border: 0;
  border-bottom: 1px dashed var(--line-strong);
  background: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  cursor: pointer;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-news .hero-copy-btn:hover {
  color: var(--cinnabar);
  border-bottom-color: var(--cinnabar);
}

.page-news .media-frame {
  margin: 0;
}

.page-news .media-frame img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-news .media-frame--wide {
  aspect-ratio: 16 / 9;
}

.page-news .media-frame--square {
  aspect-ratio: 1 / 1;
}

.page-news .media-frame--tall {
  aspect-ratio: 3 / 4;
}

.page-news .hero-figure {
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--line);
}

.page-news .media-caption {
  margin: 8px 0 0;
  font-size: 12px;
  line-height: 1.6;
  color: var(--ink-soft);
}

/* version facts */
.page-news .version-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 44px 0 0;
  padding: 0;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-news .version-facts .fact {
  padding: 14px 14px 16px;
  background: var(--paper);
}

.page-news .version-facts dt {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--ink-soft);
}

.page-news .version-facts dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.5;
  color: var(--ink);
}

/* section index */
.page-news .section-index {
  margin-top: 40px;
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 253, 248, 0.62);
}

.page-news .index-scroll {
  display: flex;
  gap: 22px;
  overflow-x: auto;
  padding-top: 10px;
  padding-bottom: 10px;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-news .index-scroll::-webkit-scrollbar {
  display: none;
}

.page-news .index-scroll a {
  flex: 0 0 auto;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
  text-decoration: none;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-news .index-scroll a:hover {
  color: var(--cinnabar);
}

.page-news .index-scroll a[aria-current="true"] {
  color: var(--cinnabar);
  border-bottom-color: var(--cinnabar);
}

/* sections */
.page-news .news-section {
  padding: 60px 0;
}

.page-news .news-section + .news-section {
  border-top: 1px solid var(--line);
}

.page-news .section-head {
  margin-bottom: 34px;
}

.page-news .section-head h2 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(25px, 4.4vw, 40px);
  line-height: 1.26;
  letter-spacing: -0.005em;
  color: var(--ink);
}

.page-news .section-lede {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.9;
  color: var(--ink-soft);
}

/* three segments */
.page-news .seg-grid {
  display: grid;
  gap: 0;
}

.page-news .seg {
  padding: 22px 0;
  border-top: 1px solid var(--line);
}

.page-news .seg-key {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(26px, 5vw, 38px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-news .seg-key--current {
  color: var(--cinnabar);
}

.page-news .seg h3 {
  margin: 6px 0 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 19px;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.page-news .seg p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

/* read aside */
.page-news .read-aside {
  display: grid;
  gap: 22px;
  align-items: center;
  margin-top: 42px;
}

.page-news .read-aside .media-frame {
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--line);
}

.page-news .read-aside-text h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 21px;
  line-height: 1.4;
  color: var(--ink);
}

.page-news .read-aside-text p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-news .text-link {
  display: inline-block;
  padding-bottom: 1px;
  border-bottom: 1px solid var(--cinnabar);
  font-size: 14px;
  color: var(--cinnabar-deep);
  text-decoration: none;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-news .text-link:hover {
  color: var(--cinnabar);
  border-bottom-color: var(--cinnabar-deep);
}

/* timeline */
.page-news .timeline-layout {
  display: grid;
  gap: 32px;
}

.page-news .timeline-figure .media-frame {
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--line);
}

.page-news .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-news .tl-item {
  position: relative;
  padding: 0 0 38px 24px;
  border-left: 1px solid var(--line);
}

.page-news .tl-item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-news .tl-dot {
  position: absolute;
  left: -5px;
  top: 10px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--paper);
  border: 1px solid var(--gold);
}

.page-news .tl-item--current .tl-dot {
  background: var(--cinnabar);
  border-color: var(--cinnabar);
  box-shadow: 0 0 0 4px rgba(178, 58, 46, 0.12);
}

.page-news .tl-head {
  position: sticky;
  top: calc(var(--header-h) + 12px);
  z-index: 1;
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 6px;
  padding: 3px 0;
  background: var(--paper);
}

.page-news .tl-year {
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1.2;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.page-news .tl-ver {
  padding: 1px 7px;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
}

.page-news .tl-item--current .tl-ver {
  border-color: var(--cinnabar);
  color: var(--cinnabar);
}

.page-news .tl-body h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 19px;
  line-height: 1.5;
  color: var(--ink);
}

.page-news .tl-body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

/* filter + update list */
.page-news .filter {
  position: relative;
}

.page-news .filter-input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-news .filter-label {
  display: inline-flex;
  align-items: center;
  margin: 0 8px 10px 0;
  padding: 6px 15px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-size: 13px;
  line-height: 1.4;
  color: var(--ink-soft);
  cursor: pointer;
  transition: color 0.18s var(--ease), background-color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-news .filter-label:hover {
  color: var(--cinnabar);
  border-color: var(--cinnabar);
}

.page-news #f-all:checked + .filter-label,
.page-news #f-new:checked + .filter-label,
.page-news #f-change:checked + .filter-label,
.page-news #f-fix:checked + .filter-label,
.page-news #f-note:checked + .filter-label {
  background: var(--cinnabar);
  border-color: var(--cinnabar);
  color: var(--white);
}

.page-news .filter-input:focus-visible + .filter-label {
  outline: 2px solid var(--cinnabar);
  outline-offset: 2px;
}

.page-news .update-list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
}

.page-news .update-item {
  padding: 22px 0;
  border-top: 1px solid var(--line);
}

.page-news .update-item:last-child {
  border-bottom: 1px solid var(--line);
}

.page-news .update-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0;
}

.page-news .update-tag {
  padding: 2px 9px 2px 7px;
  border-left: 3px solid var(--ink-soft);
  background: rgba(217, 210, 195, 0.34);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
}

.page-news .update-tag--new {
  border-left-color: var(--cinnabar);
  color: var(--cinnabar-deep);
}

.page-news .update-tag--change {
  border-left-color: var(--gold);
  color: var(--ink);
}

.page-news .update-tag--fix {
  border-left-color: var(--celadon);
  color: var(--ink);
}

.page-news .update-tag--note {
  border-left-color: var(--ink-soft);
  color: var(--ink-soft);
}

.page-news .update-time {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
}

.page-news .update-item h3 {
  margin: 8px 0 6px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 18px;
  line-height: 1.55;
  color: var(--ink);
}

.page-news .update-item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-news .update-item .update-meta {
  color: var(--ink-soft);
}

/* pure-CSS filtering */
.page-news #f-new:checked ~ .update-list .update-item:not([data-cat="new"]),
.page-news #f-change:checked ~ .update-list .update-item:not([data-cat="change"]),
.page-news #f-fix:checked ~ .update-list .update-item:not([data-cat="fix"]),
.page-news #f-note:checked ~ .update-list .update-item:not([data-cat="note"]) {
  display: none;
}

/* subscribe */
.page-news .news-subscribe {
  padding: 60px 0;
  background: var(--ink);
  color: var(--paper);
}

.page-news .chapter-label--light {
  color: var(--gold);
}

.page-news .chapter-label--light .chapter-num {
  border-color: var(--news-dark-line);
  color: var(--gold);
}

.page-news .sub-grid {
  display: grid;
  gap: 30px;
}

.page-news .sub-copy h2 {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(25px, 4.4vw, 38px);
  line-height: 1.28;
  color: var(--paper);
}

.page-news .sub-copy p {
  margin: 0 0 14px;
  max-width: 36em;
  font-size: 15px;
  line-height: 1.9;
  color: var(--news-dark-text);
}

.page-news .sub-card {
  padding: 24px 20px;
  border: 1px solid var(--news-dark-line);
  background: rgba(255, 253, 248, 0.04);
}

.page-news .sub-label {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-news .sub-label + .sub-copy-btn {
  margin-bottom: 20px;
}

.page-news .sub-copy-btn {
  display: inline-block;
  padding: 0 0 3px;
  border: 0;
  border-bottom: 1px dashed var(--news-dark-line);
  background: none;
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.01em;
  color: var(--paper);
  cursor: pointer;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-news .sub-copy-btn:hover {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

.page-news .sub-value {
  margin: 0 0 20px;
  font-family: var(--font-mono);
  font-size: 16px;
  letter-spacing: 0.04em;
  color: var(--paper);
}

.page-news .sub-action {
  margin-bottom: 16px;
}

.page-news .sub-note {
  margin: 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--news-dark-text);
}

/* archive */
.page-news .archive-grid {
  display: grid;
  gap: 30px;
}

.page-news .archive-ver {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(26px, 5vw, 34px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--cinnabar);
}

.page-news .archive-col--old .archive-ver {
  color: var(--ink-soft);
}

.page-news .archive-years {
  margin: 4px 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--ink-soft);
}

.page-news .archive-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-news .archive-col li {
  border-bottom: 1px solid var(--line);
}

.page-news .archive-col a {
  display: block;
  padding: 12px 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
  text-decoration: none;
  transition: color 0.18s var(--ease);
}

.page-news .archive-col a:hover {
  color: var(--cinnabar);
}

.page-news .archive-help {
  padding: 22px 20px;
  border-top: 1px solid var(--gold);
  background: var(--white);
}

.page-news .archive-help h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 18px;
  line-height: 1.5;
  color: var(--ink);
}

.page-news .archive-help p {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* wider screens */
@media (min-width: 720px) {
  .page-news {
    --news-pad: 32px;
  }

  .page-news .version-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-news .update-item {
    display: grid;
    grid-template-columns: 180px minmax(0, 1fr);
    gap: 6px 24px;
    align-items: start;
  }

  .page-news .update-meta {
    grid-row: 1 / span 2;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    padding-top: 4px;
  }

  .page-news .update-item h3 {
    margin-top: 0;
  }

  .page-news .archive-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 36px 40px;
  }

  .page-news .archive-help {
    grid-column: 1 / -1;
  }
}

@media (min-width: 900px) {
  .page-news .news-hero {
    padding-top: calc(var(--header-h) + 36px);
  }

  .page-news .breadcrumbs {
    padding-top: calc(var(--header-h) - 4px);
  }

  .page-news .hero-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 56px;
    align-items: start;
  }

  .page-news .hero-copy-note {
    max-width: 26em;
  }

  .page-news .seg-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 40px;
  }

  .page-news .read-aside {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 44px;
  }

  .page-news .timeline-layout {
    grid-template-columns: 280px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-news .timeline-figure {
    position: sticky;
    top: calc(var(--header-h) + 32px);
  }

  .page-news .sub-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 56px;
    align-items: start;
  }

  .page-news .sub-card {
    padding: 28px 26px;
  }

  .page-news .archive-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1.1fr);
    gap: 40px;
  }

  .page-news .archive-help {
    grid-column: auto;
  }
}

@media (min-width: 1180px) {
  .page-news .news-section {
    padding: 76px 0;
  }

  .page-news .news-subscribe {
    padding: 76px 0;
  }
}
<<<END>>>